Lubricating eccentric driving gears



March 31, 1931. J. REID 1,798,496

7 LUBRICATING ECCENTRIC DRIVING GE'ARS Filed June 25, 1927 4 Sheets-Sheet 1 Filed June 25, 1927 4 SheetsrSheet '2 abbozwew March 31,1931. J. REID 1,798,496

LUBRICATING ECGENTRIG DRIVING GEARS Filed June 25, 1927 4 Sheets-Sheet 3 I I ZI WM March 31, 1931. J. REID LUBRICATING ECCENTRI C DRIVING GEARS Filed June 25, 1927 4 Sheets-Sheet 4 inventor flfloz neg JOHN REID, OF OIL CITY, PENNSYLVANIA, ASSIGNOR TO JOSEPH REID COMPANY, OF OIL CITY, PENNSYLVANIA Patented Mar. 31 1931 UNITED STATES PATENT OFFICE GAS ENGINE Application filed June 25,

This invention relates to horizontal eccentric driving gears such as are used in pumping plants, and particularly to a means for providing adequate lubrication for the same while preventing the scattering of lubricating oil.

In the usual construction at the present time there is nothing but a low lip around the periphery of the eccentric to prevent the lubricating oil from being thrown. off by centrifugal force from the lower edge of the eccentric after passing down between the bearing surfaces. Any excess oil is thrown toward the portion of this lip furthest removed from the center of rotation and spills over the edge. It is diflicult to regulate the supply of oil so that there will be sufficient to properly lubricate the bearing surfaces without having some spilling over the above mentioned lip.

According to the present invention the lip is extended upward to substantially the height of the bearing surfaces, and is preferably curved inward at' the top, thus forming a ring shaped cup of adequate proportions for catching the oil discharging from the lower edges of the bearing surfaces.

Most of the oil is thrown by centrifugal force to that portion of the cup furthest removed from the center of rotation of the eccentric, and forms there a relatively deep pool. In accordance with another feature of the invention I provide a pump having an intake terminating in this deep pool of oil and a delivery tube for supplying oil to the bearing surfaces. I am therefore able to supply the bearing surfaces with a continuous flow of oil and thereby obtain maximum efficiency of lubrication. The pump is conveniently operated by means of a cam surface on the eccentric ring, since the pump is secured to the eccentric and travels around the ring.

The invention will now be described in detail in connection with the accompanying drawing in which several embodiments are shown by way of example.

Fig. 1 is a side view of a power wheel with associated driving eccentrics, half of the view being in section,

1927. Serial No. 201,412.

Fig. 6 is a section on the line 66 of Fig.

5, the bottom plate being removed,

F1g. 7 is a vertical section of .a portion of a modified form of eccentric, eccentric ring, and pump,

Fig. 8 is a cross section on the line 88 of Fig. 7, 1

Fig. 9 is a vertical section on the line 9-9 of Fig. 8, and

Fig. 10 is a verticalsection of a portion of an eccentric and eccentric ring showing another form of pump. eferring first to the embodiment shown 111 F igs. 1 to 4 it will be seen that a power wheel 1 is mounted upon a vertical shaft 2, upon which are likewise mounted two driving eccentrics 3. The upper eccentric is bolted to the power wheel and the lower one to the upper. Aside from this the two eccentrics are alike in all details and a description of one will therefore suffice forv both.

Each eccentric has a bearing surface 5 which is surrounded by the bearing surface 6 of an eccentric ring 7. A lip 8 is provided on the lower edge of the eccentric 3, which extends outward and then upward and finally curves inward at the top. The eccentric ring 7 has a rim 9 which curves'over the top of the lip 8 and then downward, terminating in an annulus 10 to which-is pivoted a connecting rod 11 of a pump or other apparatus to be driven.

At the portion of the eccentric 3 furthest removed from its center of rotation is mounted a pump 12. 1X basin 13 is formed in the eccentric, the pump projecting up through a hole 14 in the bottom of said basin and being secured to the under side of the basin 13 and lip 8 by cap screws 15. The pumpconsists of a flat bottom-plate 16 and an upstanding portion 17 (Fig. 2) containing a cylinder 18 in which operates a plunger 19 normally held in raised position by a spring 20. The cylinder 18 communicates at its lower end with a channel 21 formed in'a rib 22 of the platelo. In the outer end of channel 21 is a check valve 23 held in place by a plug 24. The check valve 23, plate 16, and lip 8 have registering openings which together form a passage connecting channel 21 with the space enclosed by lip 8. The opposite end of channel 21 connects with a vertical passage 25 having a check valve 26 and from which leads a delivery tube 27.

A dust ledge 28 formed on the eccentric ring 7 projects over the top of the bearing surfaces 5, 6 and then curves downward. The lowerv edge is of waving contour as shown at 29. and serves as a cam for operating the pump 12. An arm 30 (Fig. 4) is pivoted upon a bracket 31 and its free end rests upon the plunger 19 of the pump. Directly over the plunger 19 a hardened piece 32 is mounted in a slot 33 of arm 30. This hardened piece rides along cam 29 and spring 20 holds plunger '19. against arm 30 so that it reciprocates in accordance with the undulations of cam 29.

Figs. 7, 8, and 9 show a modified form of pump. In this case also a basin 34 is formed in the. eccentric 3, but instead of being clamped to the bottom of the basin the pump is mounted above the. bottom and extends through an opening 35 in the bearing annulus of the. eccentric. The pump consists of a stationary plunger 36 secured in a bracket 37 by a set screw 38, and a cylinder 39 slidable on the plunger. Cylinder 39 lies under the lower edge of eccentric ring 4.0'and is provided with a slot 41 which engages said lower edge. The lower edge ofthe eccentric ring is provided with one or more eccentric portions 40 which gradually slope into the concentric portions. The slot 41 follows the undulations of the lower edge of the eccentric ring as the eccentric rotates and causes the cylinder to reciprocate. The cylinder is guided by flanges 42 and ribs e3. An intake opening a4 is provided in the cylinder and a longitudinal passage 5 in the plunger 36 leads to a delivery tube 27' in which is. inserted a check valve'l'. The intake opening 44 is controlled by the plunger 36.

In both of the embodiments which have been described the eccentric is extended upward at 48 a short distance above the top of the bearing surfaces 5, 6, thus forming a well 4:9 adapted to receive oil delivered by the pump. A recess 50in the eccentric conimunica-tes with the well 49 and has oil grooves 51' radiating downwardly from it along the bearing surfaces. The delivery tube 27 terminates in a hole 52 leading into the recess 50. Holes 53. are spaced at suitable distances around the eccentric ring 7 or 4.0 to let olI suflicient oil into the space enclosed by lip 8 to prevent oil from spilling over the extension 48.

It will be seen that the outwardly extending rim of the eccentric ring shown in Fig. 7 is of slightly diiierent construction from that shown in Figs. 1 and 2 in that the top of it extends straight out instead of outward and downward. This form of construction will be found satisfactory in some cases.

Fig. 10 shows a further modification in which the dust ledge 54 has its inner edge 55 turned eccentrically with respect to the bearing surface (3, the pump plunger 19 being operated by a bell crank lever 56 pivoted at 57 and having a horizontal arm 58 resting on the plunger. 19, and .a. vertical arm 59 provided with a hardened piece 60 bearing on the edge In other respects this modification is substantially the same as that shown in Figs. 1 to at. V r

The operation of all three modifications is substantially the same. Oil is caught by the lip 3 and is thrownby centrifugal force into that end of the lip which is furthest removed from the center of rotation of the eccentric. There it forms a deep pool covering the intake opening of the pump which sucks up the oil and forces it through the delivery tube to. the recess 50 and well 19. The oil then runs through oil grooves 51 and thoroughly lllhI-I': cates the bearing surfaces. The oil is thrown out through holes 53 into the space enclosed by lip 8 and the number and size of the holes are so proportoned to the capacity of the pump that the oil is not permitted to rise in well 19 sufficiently high to spill over extension 48.

Having described my invention, I claim 1. In combination with a horizontal eccentric driving gear comprising an eccentric and an eccentric ring cooperating therewith and having a lip extending outwardly from the bottom of said eccentric and then upwardly to substantially the height of said eccentric, an oil pump mounted on said eccentric, a suction conduit for said pump opening into the space enclosed by said lip at the portion thereof-furthest removed from the center of rotation of the eccentric, and a delivery conduit for said pump communicating with the bearing surfaces of the eccentric and eccentric ring.

2. In combination with a horizontal eccentric drivinggear, comprising an eccentric and an eccentric ring cooperating therewith, and

having a lip extending outwardly from the bottom of said eccentric, and then upwardly to substantially the height of said eccentric, an oil pumpmounted on said eccentric, a suction'co'nduit for said pump opening into the space enclosed by said lip at the portion thereof furthest removed'from the center of rotation, upward extensions on said. eccentrio and said eccentric ringforming apfoil receiving well above their bearing surfaces, and a delivery conduit for said pump communicating with said well.

3. In combination with a horizontal eccentric driving gear comprising an eccentric and an eccentric ring cooperating therewith and having a lip extending outwardly from the bottom of said eccentric and then upwardly to substantially the height of said eccentric, an oil pump mounted on said eccentric, a suction conduit for said uinp opening into the space enclosed by said ip at the portion thereof furthest removed from the center of rotation, upward extensions on said eccentric and said eccentric ring forming an oil receiving Well above their bearing surfaces, said eccentric also having a recess opening into said well, oil conduits extending from said recess downwardly along the bearing surfaces, and a delivery conduit for said pump opening into said recess.

4. In combination with a horizontal eccentric driving gear comprising an eccentric and an eccentric ring cooperating therewith and having a lip extending outwardly from the bottom of said eccentric and then upwardly to substantially the height of said eccentric, an oil pump mounted on said eccentric, a suction conduit for said pump opening into the space enclosed by said lip at the portion thereof furthest removed from the center of rotation of the eccentric, and a delivery conduit for said pump communicating with the bearing surfaces of the eccentric and eccentric ring, said eccentric ring having a plurality of radial holes for permitting oil to flow from the bearing surface into the space enclosed by said lip.

5. In combination with a horizontal eccentrio driving gear comprising an eccentric and an eccentric ring cooperating therewith and having a lip extending outwardly from the bottom of said eccentric and then upwardly to substantially the height of said eccentric,

" an oil pump mounted on said eccentric, a suction conduit for said pump opening into the space enclosed by said lip at the portion there- I of furthest removed from the center of rotation of the eccentric, a delivery conduit for said pump communicating with the bearing an oil pump mounted on said eccentric, a suction conduit for said ump opening into the space enclosed bysaid iip at the portion thereof furthest removed from the center of rotation of the eccentric, a delivery conduit for said pump communicating with the bearing surfaces of the eccentric and eccentric ring, a dust ledge on said eccentric ring projecting over the bearing surfaces, a cam surface on said. dust ledge, and pump operating means engaging said cam surface.

7. In combination with a horizontal eccentric driving gear comprising an eccentric and an eccentric ring cooperating therewith and having a lipextending outwardly from the bottom of said eccentric and then upwardly to substantially the height of said eccentric, an oil pump mounted on said eccentric, a suction conduit for said pump opening into the space enclosed by said lip at the portion thereof furthest removed from the center of rotation of the eccentric, a delivery conduit for said pump communicating with the bearing surfaces of the eccentric and eccentric ring, a dust ledge on said eccentric ring projecting over the bearing surfaces and then downward, the lower edge of said dust ledge being in the form of a cam, and pump op erating means engaging said lower edge.

The foregoing specification signed at Oil City, Pa, this 18th day of April, 1927.

JOHN REID. 

